Pulse index

From the picture, i am pretty sure the sensor is not counting holes, just the missing part, it is to far back.
So it is only as index as is.
Use the "show hal configuration" from the machine menu to watch the sensor pin and see if it is counting only once per revolution or multiple times.

Thanks
Do I have to change the pin?
how do I show hal configuration I'm getting there learning
How do I get that pin to pulse
Do you run in terminal window to make your changes.?